Treadmill



FIG. 1 is a perspective view of a treadmill in accordance with my new design;

FIG. 2 is a rear view of the treadmill of FIG. 1;

FIG. 3 is a front view of the treadmill of FIG. 1;

FIG. 4 is a top view of the treadmill of FIG. 1;

FIG. 5 is a bottom view of the treadmill of FIG. 1; and,

FIG. 6 is a side view of the treadmill of FIG. 1, the opposite side view being a mirror image thereof.

Any parts shown in broken lines form no part of the claimed design. 

The ornamental design for a treadmill, as shown and described. 